[gobject-introspection] Add annotation for g_variant_get_string

[Tomeu Vizoso <tomeuv src gnome org>]

commit 259d67ce47be3dc28ba16260f4ffc96530dae636
Author: Tomeu Vizoso <tomeu vizoso collabora co uk>
Date:   Sat Sep 11 17:01:55 2010 +0200

    Add annotation for g_variant_get_string

 gir/glib-2.0.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gir/glib-2.0.c b/gir/glib-2.0.c
index 99563da..e86668d 100644
--- a/gir/glib-2.0.c
+++ b/gir/glib-2.0.c
@@ -218,6 +218,12 @@
  */
 
 /**
+ * g_variant_get_string:
+ * @length: (allow-none) (default NULL) (out):
+ * @returns:
+ */
+
+/**
  * g_get_language_names:
  * @returns: (array zero-terminated=1) (transfer none):
  */